body {
    margin: 0;
    background: #f4f6f5;
    font-family: "Poppins", sans-serif;
}


.photo-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 20px 30px;
    background: white;
    position: sticky;
    top: 0;
    z-index: 10;
    border-bottom: 1px solid rgba(0,0,0,0.1);
}

.photo-header h1 {
    margin: 0;
    font-size: 1.6rem;
    font-weight: 500;
}

.back-btn {
    text-decoration: none;
    color: #1c1c1c;
    font-size: 1.1rem;
    padding: 6px 12px;
    border-radius: 8px;
    transition: 0.25s ease;
}

.back-btn:hover {
    background: rgba(0,0,0,0.08);
}


.masonry {
    column-count: 3;
    column-gap: 20px;
    padding: 30px;
}

.m-item {
    width: 100%;
    margin-bottom: 20px;
    border-radius: 16px;
    break-inside: avoid;
    cursor: pointer;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeonly 0.8s ease forwards;
    animation-delay: 0.1s;
    transition: 0.35s ease;
    box-shadow: 0 4px 14px rgba(0,0,0,0.08);
}

.m-item:hover {
    transform: translateY(-8px) scale(1.03);
    box-shadow: 0 12px 26px rgba(0,0,0,0.18);
}

@keyframes fadeonly {
    to { opacity: 1; }
}


.lightbox {
    position: fixed;
    top: 0; left: 0;
    width: 100vw; height: 100vh;
    background: rgba(0,0,0,0.8);
    display: none;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.lightbox.active {
    display: flex;
}

.lightbox img {
    max-width: 90%;
    max-height: 90%;
    border-radius: 12px;
    animation: zoom 0.3s ease;
}

@keyframes zoom {
    from {
         opacity: 0;
          transform: scale(0.85);
         }to{
         opacity: 1; 
         transform: scale(1);
         }
}

 
@media (max-width: 900px) {
    .masonry {
        column-count: 2;
    }
}

@media (max-width: 600px) {
    .masonry {
        column-count: 1;
    }

    .m-item {
        border-radius: 12px;
    }
}